Subject: + smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch added to -mm tree
To: srivatsa.bhat@xxxxxxxxxxxxxxxxxx,bp@xxxxxxx,ego@xxxxxxxxxxxxxxxxxx,fweisbec@xxxxxxxxx,hch@xxxxxxxxxxxxx,mgalbraith@xxxxxxx,mgorman@xxxxxxx,mingo@xxxxxxxxxx,oleg@xxxxxxxxxx,paulmck@xxxxxxxxxxxxxxxxxx,peterz@xxxxxxxxxxxxx,riel@xxxxxxxxxx,rjw@xxxxxxxxxxxxx,rostedt@xxxxxxxxxxx,rusty@xxxxxxxxxxxxxxx,tglx@xxxxxxxxxxxxx,tj@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 15 May 2014 14:59:35 -0700
The patch titled
Subject: smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5
has been added to the -mm tree. Its filename is
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch
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------------------------------------------------------
From: "Srivatsa S. Bhat" <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
Subject: smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Mike Galbraith <mgalbraith@xxxxxxx>
Cc: Gautham R Shenoy <ego@xxxxxxxxxxxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/smp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN kernel/smp.c~smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5 kernel/smp.c
--- a/kernel/smp.c~smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5
+++ a/kernel/smp.c
@@ -195,13 +195,15 @@ void generic_smp_call_function_single_in
*/
if (unlikely(!cpu_online(smp_processor_id()) && !warned)) {
warned = true;
- WARN_ON(1);
+ WARN(1, "IPI on offline CPU %d\n", smp_processor_id());
+
/*
* We don't have to use the _safe() variant here
* because we are not invoking the IPI handlers yet.
*/
llist_for_each_entry(csd, entry, llist)
- pr_warn("SMP IPI Payload: %pS \n", csd->func);
+ pr_warn("IPI callback %pS sent to offline CPU\n",
+ csd->func);
}
llist_for_each_entry_safe(csd, csd_next, entry, llist) {
_
Patches currently in -mm which might be from srivatsa.bhat@xxxxxxxxxxxxxxxxxx are
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu.patch
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-fix.patch
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu-v3.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu-v5.patch
cpu-hotplug-smp-flush-any-pending-ipi-callbacks-before-cpu-offline.patch
linux-next.patch
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